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A cruise ship travels 330 miles due east before turning 25 degrees north of east. It travels 180 miles along its new course. How far is the cruise ship from its initial position?

Respuesta :

we know that
applying the law of cosines
c²=a²+b²-2*a*b*cos C

in this problem
a=330 miles
b=180 miles
c=-----> distance of the cruise ship from its initial position
C=180-25----> C=155°

see the attached picture to better understand the problem
c²=a²+b²-2*a*b*cos C----> c²=330²+180²-2*330*180*cos 155
c²=248969.37------> c=498.97 miles

the answer is
498.97 miles

Ver imagen calculista

Answer:

Hence, the distance of the ship from initial position is:

498.977 miles.

Step-by-step explanation:

We will apply the cosine law to calculate the distance of the cruise ship from the initial position.

The cosine law is given as:

[tex]c^2=a^2+b^2-2ab\cos C[/tex]

where a is the distance covered by the ship in east direction.

b is the distance covered by ship in the north-east direction.

and c is the distance of the ship from the initial point.

The angle C is the angle between a and b and is given by:

C=155°.

Here we have: a=330 miles, b=180 miles.

Hence, we apply the cosine law to obtain:

[tex]c^2=(330)^2+(180)^2-2\times 330\times 180\times \cos 155\\\\c^2=108900+32400-118800\times (-0.906308)\\\\c^2=248977.944\\\\c=498.977[/tex]

Hence, the distance of the ship from initial position is:

498.977 miles.

Ver imagen virtuematane